<template>
  <div class="shopcart" :class="{ 'disabled': disabled }">
    <div class="content">
      <div class="content-left" @click="toggleShow">
        <div class="logo-wrapper">
          <div class="logo" :class="{highlight: totalCount}">
            <!-- 使用Element Plus图标 -->
            <el-icon class="icon-shopping_cart" :class="{highlight: totalCount}">
              <ShoppingCart />
            </el-icon>
          </div>
          <div class="num" v-if="totalCount">{{totalCount}}</div>
        </div>
        <div class="price" :class="{highlight: totalCount}">￥{{totalPrice}}</div>
        <div class="desc">另需配送费￥{{deliveryPrice}}元</div>
      </div>
      <div class="content-right">
        <div class="pay" :class="payClass" @click="goToCheckout">
          {{payText}}
        </div>
      </div>
    </div>
    <transition name="move">
      <div class="shopcart-list" v-show="listShow">
        <div class="list-header">
          <h1 class="title">购物车</h1>
          <span class="empty" @click="clearCart">清空</span>
        </div>
        <div class="list-content">
          <ul>
            <li class="food" v-for="(food, index) in selectedFoods" :key="index">
              <span class="name">{{food.name}}</span>
              <div class="price"><span>￥{{food.price}}</span></div>
              <div class="cartcontrol-wrapper">
                <CartControl :food="food"/>
              </div>
            </li>
          </ul>
        </div>
      </div>
    </transition>
  </div>
</template>

<script setup>
import { computed, ref } from 'vue';
import { useRouter } from 'vue-router';
import CartControl from './CartControl.vue';
import { ShoppingCart } from '@element-plus/icons-vue'
const props = defineProps({
  selectedFoods: {
    type: Array,
    default: () => []
  },
  deliveryPrice: {
    type: Number,
    default: 0
  },
  minPrice: {
    type: Number,
    default: 0
  },
  disabled: {
    type: Boolean,
    default: false
  },
  merchantId: {
    type: Number,
    required: true
  },
  merchantName: {
    type: String,
    required: true
  },
  merchantAvatar: {
    type: String,
    required: true
  }
});

const emit = defineEmits(['clear']);

const router = useRouter();
const listShow = ref(false);

const totalCount = computed(() => {
  return props.selectedFoods.reduce((total, food) => total + food.count, 0);
});

const totalPrice = computed(() => {
  return props.selectedFoods.reduce((total, food) => total + (food.price * food.count), 0);
});

const payClass = computed(() => {
  if (props.disabled) return 'disabled';
  return totalPrice.value >= props.minPrice ? 'enough' : 'not-enough';
});

const payText = computed(() => {
  if (props.disabled) return '距离过远不支持配送';
  if (totalCount.value === 0) {
    return `￥${props.minPrice}元起送`;
  } else if (totalPrice.value < props.minPrice) {
    return `还差￥${props.minPrice - totalPrice.value}元起送`;
  } else {
    return '去结算';
  }
});

const toggleShow = () => {
  if (totalCount.value > 0) {
    listShow.value = !listShow.value;
  }
};

const clearCart = () => {
  emit('clear');
};

const goToCheckout = () => {
  if (totalPrice.value >= props.minPrice && !props.disabled) {
    router.push({
      path: `/order/confirm/${props.merchantId}`,
      query: {
        merchantName: props.merchantName,
        merchantAvatar: props.merchantAvatar,
        deliveryFee: props.deliveryPrice,
        selectedFoods: JSON.stringify(props.selectedFoods)
      }
    });
  }
};
</script>

<style lang="scss" scoped>

.shopcart {
  position: fixed;
  left: 0;
  bottom: 0;
  z-index: 50;
  width: 100%;
  height: 48px;
  &.disabled {
    .content-right .pay {
      background: #ccc !important;
      cursor: not-allowed;
    }
  }
  .content {
    display: flex;
    background: #141d27;
    font-size: 0;
    color: rgba(255, 255, 255, 0.4);
    .content-left {
      flex: 1;
      .logo-wrapper {
        display: inline-block;
        vertical-align: top;
        position: relative;
        top: -10px;
        margin: 0 12px;
        padding: 6px;
        width: 56px;
        height: 56px;
        box-sizing: border-box;
        border-radius: 50%;
        background: #141d27;
        .logo {
          width: 100%;
          height: 100%;
          border-radius: 50%;
          text-align: center;
          background: #2b343c;
          &.highlight {
            background: rgb(0, 160, 220);
          }
          .icon-shopping_cart {
            line-height: 44px;
            font-size: 24px;
            color: #82808a;
            &.highlight {
              color: #fff;
            }
          }
        }
        .num {
          position: absolute;
          top: 0;
          right: 0;
          width: 24px;
          height: 16px;
          line-height: 16px;
          text-align: center;
          border-radius: 16px;
          font-size: 9px;
          font-weight: 700;
          color: #ffffff;
          background: rgb(240, 20, 20);
          box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.4);
        }
      }
      .price {
        display: inline-block;
        vertical-align: top;
        margin-top: 12px;
        line-height: 24px;
        padding-right: 12px;
        box-sizing: border-box;
        border-right: 1px solid rgba(255, 255, 255, 0.1);
        font-size: 16px;
        font-weight: 700;
        &.highlight {
          color: #fff;
        }
      }
      .desc {
        display: inline-block;
        vertical-align: top;
        margin: 12px 0 0 12px;
        line-height: 24px;
        font-size: 10px;
      }
    }
    .content-right {
      flex: 0 0 105px;
      width: 105px;
      .pay {
        height: 48px;
        line-height: 48px;
        text-align: center;
        font-size: 12px;
        font-weight: 700;
        color: #fff;
        &.not-enough {
          background: #2b333b;
        }
        &.enough {
          background: #00b43c;
          color: #fff;
        }
        &.disabled {
          background: #ccc !important;
          cursor: not-allowed;
        }
      }
    }
  }
  .shopcart-list {
    position: absolute;
    left: 0;
    top: 0;
    z-index: -1;
    width: 100%;
    transform: translateY(-100%);
    &.move-enter-active, &.move-leave-active {
      transition: transform .3s;
    }
    &.move-enter, &.move-leave-to {
      transform: translateY(0);
    }
    .list-header {
      height: 40px;
      line-height: 40px;
      padding: 0 18px;
      background: #f3f5f7;
      border-bottom: 1px solid rgba(7, 17, 27, 0.1);
      .title {
        float: left;
        font-size: 14px;
        color: rgb(7, 17, 27);
      }
      .empty {
        float: right;
        font-size: 12px;
        color: rgb(0, 160, 220);
      }
    }
    .list-content {
      padding: 0 18px;
      max-height: 217px;
      overflow: hidden;
      background: #fff;
      .food {
        position: relative;
        padding: 12px 0;
        box-sizing: border-box;
        border-bottom: 1px solid rgba(7, 17, 27, 0.1);
        .name {
          line-height: 24px;
          font-size: 14px;
          color: rgb(7, 17, 27);
        }
        .price {
          position: absolute;
          right: 90px;
          bottom: 12px;
          line-height: 24px;
          font-size: 14px;
          font-weight: 700;
          color: rgb(240, 20, 20);
        }
        .cartcontrol-wrapper {
          position: absolute;
          right: 0;
          bottom: 6px;
        }
      }
    }
  }
}
</style>